We studied the temperature behaviour of the absorption spectra of Au/PTFE nanocomposites with various filling factors at 77-936 K. The obtained temperature dependences of surface plasmon energy and bandwidth in gold nanoparticles with size of 5 nm proves the aggregation of nanoparticles due to thermal softening of polymer matrix and consequent melting of nanoparticles with formation of isolated large (about 25 nm) nanoparticles. The melting of gold nanoparticles occurs at temperatures considerably lower than the melting point of bulk gold. The interaction between the gold nanoparticles significantly affects the melting of the nanoparticles. When the filling factor increases the melting point of gold nanoparticles decreases and the spectral signature of their melting become stronger.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/17987 must be provided.

1. Surface enhanced size-dependent photoluminescence from silver nanoparticles in silica matrix
2. Melting of copper nanoparticles revealed by absorption spectroscopy
3. Photoluminescence of ZnO films studied by femptosecond sapphire:Ti laser
4. Structure and Optical Spectra of Cu Nanoparticles in Silica Matrix